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mic.c

/* $Id: mic.c,v 1.12.2.4 2004/01/13 23:48:39 keil Exp $
 *
 * low level stuff for mic cards
 *
 * Author       Stephan von Krawczynski
 * Copyright    by Stephan von Krawczynski <skraw@ithnet.com>
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/init.h>
#include "hisax.h"
#include "isac.h"
#include "hscx.h"
#include "isdnl1.h"

extern const char *CardType[];

static const char *mic_revision = "$Revision: 1.12.2.4 $";

#define byteout(addr,val) outb(val,addr)
#define bytein(addr) inb(addr)

#define MIC_ISAC  2
#define MIC_HSCX  1
#define MIC_ADR         7

/* CARD_ADR (Write) */
#define MIC_RESET      0x3    /* same as DOS driver */

static inline u_char
readreg(unsigned int ale, unsigned int adr, u_char off)
{
      register u_char ret;

      byteout(ale, off);
      ret = bytein(adr);
      return (ret);
}

static inline void
readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
{
      byteout(ale, off);
      insb(adr, data, size);
}


static inline void
writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
{
      byteout(ale, off);
      byteout(adr, data);
}

static inline void
writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
{
      byteout(ale, off);
      outsb(adr, data, size);
}

/* Interface functions */

static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
      return (readreg(cs->hw.mic.adr, cs->hw.mic.isac, offset));
}

static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
      writereg(cs->hw.mic.adr, cs->hw.mic.isac, offset, value);
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      readfifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      writefifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
}

static u_char
ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
{
      return (readreg(cs->hw.mic.adr,
                  cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0)));
}

static void
WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
{
      writereg(cs->hw.mic.adr,
             cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0), value);
}

/*
 * fast interrupt HSCX stuff goes here
 */

#define READHSCX(cs, nr, reg) readreg(cs->hw.mic.adr, \
            cs->hw.mic.hscx, reg + (nr ? 0x40 : 0))
#define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.mic.adr, \
            cs->hw.mic.hscx, reg + (nr ? 0x40 : 0), data)

#define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.mic.adr, \
            cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)

#define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.mic.adr, \
            cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)

#include "hscx_irq.c"

static irqreturn_t
mic_interrupt(int intno, void *dev_id)
{
      struct IsdnCardState *cs = dev_id;
      u_char val;
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
      val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
      Start_HSCX:
      if (val)
            hscx_int_main(cs, val);
      val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
      Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
      if (val) {
            if (cs->debug & L1_DEB_HSCX)
                  debugl1(cs, "HSCX IntStat after IntRoutine");
            goto Start_HSCX;
      }
      val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0xFF);
      writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0xFF);
      writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0xFF);
      writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0x0);
      writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0x0);
      writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0x0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
release_io_mic(struct IsdnCardState *cs)
{
      int bytecnt = 8;

      if (cs->hw.mic.cfg_reg)
            release_region(cs->hw.mic.cfg_reg, bytecnt);
}

static int
mic_card_msg(struct IsdnCardState *cs, int mt, void *arg)
{
      u_long flags;

      switch (mt) {
            case CARD_RESET:
                  return(0);
            case CARD_RELEASE:
                  release_io_mic(cs);
                  return(0);
            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  inithscx(cs); /* /RTSA := ISAC RST */
                  inithscxisac(cs, 3);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_TEST:
                  return(0);
      }
      return(0);
}

int __devinit
setup_mic(struct IsdnCard *card)
{
      int bytecnt;
      struct IsdnCardState *cs = card->cs;
      char tmp[64];

      strcpy(tmp, mic_revision);
      printk(KERN_INFO "HiSax: mic driver Rev. %s\n", HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_MIC)
            return (0);

      bytecnt = 8;
      cs->hw.mic.cfg_reg = card->para[1];
      cs->irq = card->para[0];
      cs->hw.mic.adr = cs->hw.mic.cfg_reg + MIC_ADR;
      cs->hw.mic.isac = cs->hw.mic.cfg_reg + MIC_ISAC;
      cs->hw.mic.hscx = cs->hw.mic.cfg_reg + MIC_HSCX;

      if (!request_region(cs->hw.mic.cfg_reg, bytecnt, "mic isdn")) {
            printk(KERN_WARNING
                   "HiSax: %s config port %x-%x already in use\n",
                   CardType[card->typ],
                   cs->hw.mic.cfg_reg,
                   cs->hw.mic.cfg_reg + bytecnt);
            return (0);
      }
      printk(KERN_INFO "mic: defined at 0x%x IRQ %d\n",
            cs->hw.mic.cfg_reg, cs->irq);
      setup_isac(cs);
      cs->readisac = &ReadISAC;
      cs->writeisac = &WriteISAC;
      cs->readisacfifo = &ReadISACfifo;
      cs->writeisacfifo = &WriteISACfifo;
      cs->BC_Read_Reg = &ReadHSCX;
      cs->BC_Write_Reg = &WriteHSCX;
      cs->BC_Send_Data = &hscx_fill_fifo;
      cs->cardmsg = &mic_card_msg;
      cs->irq_func = &mic_interrupt;
      ISACVersion(cs, "mic:");
      if (HscxVersion(cs, "mic:")) {
            printk(KERN_WARNING
                "mic: wrong HSCX versions check IO address\n");
            release_io_mic(cs);
            return (0);
      }
      return (1);
}

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